What is the most important thing for me to accomplish?
Micah 6:8
8 I will shew thee, O man, what is good, and what the Lord requireth of thee: Verily, to do judgment, and to love mercy, and to walk solicitous with thy God.
Matthew 22:37-39
37 Jesus said to him: Thou shalt love the Lord thy God with thy whole heart, and with thy whole soul, and with thy whole mind. 38 This is the greatest and the first commandment. 39 And the second is like to this: Thou shalt love thy neighbor as thyself.
Matthew 28:19-20
19 Going therefore, teach ye all nations; baptizing them in the name of the Father, and of the Son, and of the Holy Ghost. 20 Teaching them to observe all things whatsoever I have commanded you: and behold I am with you all days, even to the consummation of the world.
Catholic view (generated):
To love God with all your heart, soul, mind, and strength, and to love your neighbor as yourself. This is the greatest commandment given by Jesus. Seek to grow in holiness, deepen your relationship with God, and strive to bring His love and mercy to others.