Life and its mysteries. No one can comprehend what's going on in life with time. Living and loving the present is the best choice. We learn and experience the good or bad stuff ok each moment.
Those who are experts in the lives of others are novices in their own lives.
It's sarcasm, we consider ourselves perfect when we suggest or advise others but at the same time in our life, we are learning from our mistakes.
And you are absolutely right, advice when given or taken costs you nothing. Dreemport dropped me here.