From a letter:
Even if all your complaints about your spouse are well-founded and valid—show her your love, nevertheless. Show her unconditional love.
The sages taught that all our exile is due to the sin of senseless, unwarranted hatred.
When each one of us will start with unwarranted, unconditional love in our own domain, from there it will spread to all else that we do, and from there to the entire world, speedily in our days, amen.

Emotions don't have the logic of mathematical problems. The child learns from his parents how to deal with them, from that pattern the individual will go through life. If there are other members that have interest in that child, he/she can modify those emotions, and learn a better way to relate. The growth is therefore, not uniform! The word " unconditional" is by itself unique because in reality, most of human interactions are transactional. Is the love of a mother always unconditional? The answer should be yes ,but not in all cases, and that is , sadly, how some people enter therapy -to fix what is missing. If, in some cases the love of a mother is conditional, It is difficult to understand what real " unconditional" love is. since the baby didn't learn it! Love for H'. is unconditional, but " Vehavta le reiachah kamocha" shows us that it is also difficult to achieve since we have to be reminded to do it. Unconditional is an aspiration to achieve!