The way we grow in wisdom is not linear.
The things that often nourish us are perennial and we have been engaging them since day one, in ever more complex and beautiful forms; love, loss, joy, pain, bliss and suffering.
In fact, wisdom often flourishes in the patient return to these same themes, each time revealing new aspects of something already intimate. In spiritual practice, these basic themes are things like: attachment, compassion, emptiness, judgement, insight, acceptance, faith and doubt.