depends on what youre aware of...
if you are aware of why the fail is occurring, then maybe you could, or can prevent it from happening now, or again later.
now believing that ignorance is bliss, only works for so long, thats just choosing to be naive of what is possible in life good or bad.
either way you will build integrity, and motivation as long you know you at least tried, and accomplished what you were capable of in this life. for me, knowing i let my life run its course, and that i did what i could with the personal strengths and choices i allowed myself to be aware of - will definitely allow me to feel content in final days and moments.
i really really hope this is what you have in mind here, or is of use anyways, heheh.
Life Love & Laughter!