What does it mean for a gentleman to ask for more happiness?

A gentleman seeks misfortune rather than happiness.

A man of noble character only asks himself what misfortune he has, not what blessing he has.

A gentleman naturally knows that blessings come from practice, so he only asks about disasters and doesn't ask about blessings. As long as he is kind-hearted, pure-minded, and a gentleman, he has an unswerving mind and temperament. He is not afraid of disasters, dares to face reality and is tempered by disasters, so he dares to "share weal and woe". And asking for happiness is considered greedy and enterprising, so a gentleman disdains it. This sentence is intended to show a fearless generosity and generosity.

This is my understanding of this sentence. I hope I can help you.