As St. Teresa of Avila’s writings can sometimes be difficult to understand I highly recommend reading Fr. Thomas Dubay’s book, The Fire Within. He does a great job of explaining the writings of St. Teresa and St. John of the Cross.
It will be helpful to learn the commonly used terminology for each type of prayer when you are discussing your experiences with a spiritual director.
I have included below excerpt from Fr. Jordan Aumann’s commentary on St. Teresa’s Grades of Prayer. There are 9 grades, but I have only included the first six.
St. Teresa of Avila
9 Grades of Prayer
Grade 1: Vocal Prayer (Act of the Will)
The words spoken or sung aloud have immense power to purify or cleanse one’s spirit, soul and body of all unwanted human and spiritual energies. Normally it works slowly in souls filled with sins or sinful energies, while faster in purer souls. It is sad to see that many Christians stop at this grade of prayer after a long vocal prayer or hymn singing. To let the Spirit lead us to a higher grade in prayer, it seems better if we can do our vocal prayer at the beginning of our prayer time.
Grade 2: Meditation (Act of the Will)
Rev. Jordan Aumann succinctly sums up the fundamentals of meditation as follows: “Meditation can be defined as a reasoned application of the mind to some supernatural truth in order to penetrate its meaning, love it, and carry it into practice with the assistance of grace.” (Spiritual Theology, p.318) “Regardless of method, all mediation can be reduced ultimately to a basic framework containing all the essential parts of meditation: consideration of some supernatural truth, application of that truth to one’s life, and the resolution to do something about it.” (Ibid., p.322)
In this context we may better recognize the functions of meditation. Indeed, meditation can help us penetrate certain spiritual truth, know ourselves, repent of our sins, correct our faults, discern God’s will, understand others, realize the situation, refocus our life, and make a firm resolution to spend our time, energy and resources fruitfully for our love for God and others. As St. Teresa points out, meditation consists not so much in thinking a great deal but in loving a lot. Yet love cannot be idle. It constantly urges us to action. (cf. Spiritual Theology, p.319)
Grade 3: Affective Prayer (Act of the Will)
Affective prayer may be defined as a type of prayer in which the operations of the will predominate over discursus of the intellect. It is merely a simplified meditation in which love predominates …
The will is a blind faculty that needs direction and enlightenment before it can love and desire the good. For that reason discursive meditation and spiritual reading play an important part in the practice of affective prayer; they supply the material that stimulates the activity of the will.
“Thank you, Lord. This is exactly what I need!” A good meditation and affective prayer oftentimes end with this grateful conviction towards a certain truth, situation, experience, trial, consolation, or discernment, etc., in life. It may also save us a lot of time and energies struggling in confusion and bitterness, etc.
Grade 4: Prayer of Simplicity or Acquired Recollection (Act of the Will assisted by the Grace of God)
It is simply the prayer of acquired recollection, a simple love or gaze on some divine object, whether on God Himself, His nature, the Holy Eucharist, some Christian truth or mystery. The former reasoning and affection have now been transformed into a simple loving attention on the divine. The prayer is the last grade of ascetical prayer, meaning that the soul is able to attain to this prayer by its own effort with the help of ordinary grace. There is no particular method for this prayer. All it takes is a simple loving gaze and attention amidst a great deal of sacred space and quietude. However, it takes a certain intensity of God’s grace or Energy to do so, i.e., the intensity which builds up through the former three grades of prayer. (cf. Spiritual Theology, pp.327-328)
We may begin to want to spend a lot more time before the Lord. Yet, in varying degrees, we may find ourselves continuously hindered by various unknown forces. Prayer is indeed a daily battle. How deep we pray can be defined by how deep we can tap into God’s Energies, the unshakable foundation of all creation everywhere. Between God and us, there are various types of unholy and unwanted energies disorienting us from God’s holy presence. However, the Lord is always our good Shepherd who enjoys blessing us. With our patient cooperation, God will guide us through.
Fr. Aumann cautions us as follows: “During the practice of the prayer of simplicity, the soul should strive to preserve the loving attention that is fixed on God, but without forcing itself. It must avoid distractions and slothfulness, but if it exerts too much effort it will destroy the simplicity of the prayer. Psychologically it is difficult for us to remain attentive over a long period of time, and therefore we should not expect, especially in the beginning, to be able to practice the prayer of simplicity for long periods of time. As soon as the loving attention begins to waver, we should turn to the use of affective prayer or simple meditation. All must be done gently and without violence. Nor should the soul be upset if periods of dryness occur. The prayer of simplicity is not always sweet and consoling type of prayer; it is also a transition from ascetical to mystical prayer, and therefore the soul may experience the aridity that normally accompanies transitional states.” (Ibid., p.328)