All of us stumble in different ways. If we know Jesus Christ, we'll feel grieved when we stumble (sin). I feel bad when I stumble, especially when I mess up in a way that I know I've been victorious in. The scripture has a simple way of helping us to not stumble. It's through love.
He who loves his brother remains in the light, and there is no occasion for stumbling in him. - 1John 2:10