In Mark 12:30–31, Jesus tells us to
30 Love the Lord your God with all your heart and with all your soul and with all your mind and with all your strength
31 The second is this: ‘Love your neighbor as yourself.’There is no commandment greater than these.”
It is in living the commands of love that Jesus gave us. If we do not realize this we can fall into the trap of thinking that dying to self or carrying our cross is just an internal, self-centric, pious thing we do without reference to other people in our lives to whom we own practical love.
We are aware that we need to pray and to go to Mass and receive the Sacraments. This sometimes requires sacrifice as we don’t always feel like it, and sometimes those are inconvenient.
Nevertheless to pray regardless, to go to Confession and Mass regardless, with the sacrifice that doing so sometimes requires, is dying to self and carrying your cross.
Just as being pleasant, kind, and helpful, and living practical acts of kindness, can also require 'dying to self, and carrying your cross.
We sometimes don’t feel like doing things for others, or being thoughtful or pleasant in small ways or large, but to do so anyway is to die to self and to carry your cross.
In Matthew 25:31-46, Jesus further emphasizes this when He describes how He judges our souls at death. Jesus says
31 “When the Son of Man comes in his glory, and all the angels with him, he will sit on his glorious throne. 32 All the nations will be gathered before him, and he will separate the people one from another as a shepherd separates the sheep from the goats. 33 He will put the sheep on his right and the goats on his left.
34 “Then the King will say to those on his right, ‘Come, you who are blessed by my Father; take your inheritance, the kingdom prepared for you since the creation of the world. 35 For I was hungry and you gave me something to eat, I was thirsty and you gave me something to drink, I was a stranger and you invited me in, 36 I needed clothes and you clothed me, I was sick and you looked after me, I was in prison and you came to visit me.’
37 “Then the righteous will answer him, ‘Lord, when did we see you hungry and feed you, or thirsty and give you something to drink? 38 When did we see you a stranger and invite you in, or needing clothes and clothe you? 39 When did we see you sick or in prison and go to visit you?’
40 “The King will reply, ‘Truly I tell you, whatever you did for one of the least of these brothers and sisters of mine, you did for me.’
41 “Then he will say to those on his left, ‘Depart from me, you who are cursed, into the eternal fire prepared for the devil and his angels. 42 For I was hungry and you gave me nothing to eat, I was thirsty and you gave me nothing to drink, 43 I was a stranger and you did not invite me in, I needed clothes and you did not clothe me, I was sick and in prison and you did not look after me.’
44 “They also will answer, ‘Lord, when did we see you hungry or thirsty or a stranger or needing clothes or sick or in prison, and did not help you?’
45 “He will reply, ‘Truly I tell you, whatever you did not do for one of the least of these, you did not do for me.’
46 “Then they will go away to eternal punishment, but the righteous to eternal life.”