kṛṣṇa says rise, engage, do it, in many ways throughout the bhagavadgītā; but it is worth repeating again and again.  Because when you receive encouragement, either from someone or from yourself the first step becomes easier...and it puts the fear of failure in perspective...

Well, didn't I need to hear this just now! These verses have been (once again) falling uncannily into my consciousness at just the right time... : )