Believe in yourself first. Then believe in the Omnipresent Lord. When you have faith in these two, neither the good nor the bad will affect you.
When one is deluded by the mere external world and when one does not attain success in external desires, the faith in the Lord diminishes. So, give up such desires.
Desire only for the spiritual relationship. Then you won't become the target of doubts and difficulties. The important thing for this is faith in the Lord. Without Faith, you start doubting everything - big and small
