Devotees are not impressed by the poverty or wealth in material sense in any way; what impresses is devotion.
Enthusiasm is a very powerful offering of devotion.
Knowledge means to know that I am helpless in this world and only the power of God can save me.
A grain of devotion is more valuable than tons of faithlessness.
Srimad Bhagavatam 2.6.34,
Srila Prabhupada
Preaching means to see whatever little spark of bhakti in someone and fan it into a blazing fire, which will burn all the anarthas (contaminations) and make him a great devotee.
Material world is like a dream.
If we do the right thing with right intent, that is our success.
Even if you have done no wrong, no mistake in the last 50 years, remember the mistake you did 51 years ago and repent for it and become humble.