What is meant by karma? If our lives are determined by karma, can we change it?
Yes. Karma refers to our past volitional deeds and thoughts, forming seeds stored in our 8th consciousness which will be manifested when the right conditions come. Some ripen in this life, some in the next life and some in future lives. Evil seeds will give rise to evil fruits. They will not be cancelled out by doing good deeds. The only thing to change our fate and destiny or prevent the reaping of evil effect is to practice kind deeds, correct our faults and accumulate more good conditions. If many good deeds are accumulated, the good fruit will ripen quickly and life can be changed for the better.