We are called to be saints, thus we are called to aim for what is morally best. We need to correctly form our consciences to be able to know what is best, and then strive for that.
Deus Caritas Est:
Acknowledgment of the living God is one path towards love, and the “yes” of our will to his will unites our intellect, will and sentiments in the all- embracing act of love. But this process is always open-ended; love is never “finished” and complete; throughout life, it changes and matures, and thus remains faithful to itself. Idem velle atque idem nolle [9]—to want the same thing, and to reject the same thing—was recognized by antiquity as the authentic content of love: the one becomes similar to the other, and this leads to a community of will and thought. The love-story between God and man consists in the very fact that this communion of will increases in a communion of thought and sentiment, and thus our will and God’s will increasingly coincide: God’s will is no longer for me an alien will, something imposed on me from without by the commandments, but it is now my own will, based on the realization that God is in fact more deeply present to me than I am to myself.[10] Then self- abandonment to God increases and God becomes our joy (cf. Ps 73 [72]:23-28).
This encyclical (
Veritatis Splendor) from Saint

extrahappy

JPII is awesome with regards to seeking God’s will. I tried to find a quote that covered it all, but it is something that you read, and then read some more, and it all adds up. Here are a couple of excerpts:
"64. The words of Jesus just quoted also represent a call to form our conscience, to make it the object of a continuous conversion to what is true and to what is good. In the same vein, Saint Paul exhorts us not to be conformed to the mentality of this world, but to be transformed by the renewal of our mind (cf. Rom 12:2). It is the “heart” converted to the Lord and to the love of what is good which is really the source of true judgments of conscience. Indeed, in order to “prove what is the will of God, what is good and acceptable and perfect” (Rom 12:2), knowledge of God’s law in general is certainly necessary, but it is not sufficient: what is essential is a sort of “connaturality” between man and the true good.110
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Christians have a great help for the formation of conscience in the Church and her Magisterium. As the Council affirms: "In forming their consciences the Christian faithful must give careful attention to the sacred and certain teaching of the Church. For the Catholic Church is by the will of Christ the teacher of truth. Her charge is to announce and teach authentically that truth which is Christ, and at the same time with her authority to declare and confirm the principles of the moral order which derive from human nature itself ".111 It follows that the authority of the Church, when she pronounces on moral questions, in no way undermines the freedom of conscience of Christians.
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In acknowledging these commandments, Christian hearts and our pastoral charity listen to the call of the One who “first loved us” (1Jn 4:19). God asks us to be holy as he is holy (cf. Lev 19:2), to be — in Christ — perfect as he is perfect (cf. Mt 5:48). The unwavering demands of that commandment are based upon God’s infinitely merciful love (cf. Lk 6:36), and the purpose of that commandment is to lead us, by the grace of Christ, on the path of that fullness of life proper to the children of God."