Zen masters do not teach the meaning of life directly by giving lectures. In the discipline of mindfulness, you are in one way or another encouraged to discover the intangible and the indescribable. In other words, you are encouraged to go beyond the three-dimensional walls of reality.
Books and talks on the subject might be helpful to give you some kind of clue. However, beyond that, you need to summon up a bit of courage to step into the uncharted territory yourself.
In the middle ages, some of the Zen masters in Japan, having experienced the most vigorous form of mental rejuvenation in the highly regimented monastic life, tried to convey the gist of the indescribable to ordinary people. In doing so, they always chose an indirect approach. The concept was almost the opposite of rococo. It was feminine rather than masculine.
If you dig deeper, you would find some characteristics of mature mindfulness, which the medieval Zen masters considered to be the attributes of someone who has blended his or her ego with nature.
People who do not shout from the rooftops know the childish side of their own ego. They would rather not to say the most important message, in spite of, or perhaps because of the necessity to convey it to others. In doing so, they understand the unspoken words of others much more than what is said or written directly. Above all, they prefer a subtle sense of humour.
This is a pig topic. There will be more posting on this website about the indescribable in mindfulness.