Reincarnation and Karma as truth

The Gita states Reincarnation and Karma as absolute truth.

If we could for one moment, hold this thought of reincarnation as truth, how would we change the life we are in now?

Would we treat people with more kindness and empathy? Perhaps we would cherish our loved ones more? Would we be responsible for our actions or even our words, knowing that we would be held accountable in our next incarnation?