If what you aim at does not come about then...

قال الإمام علي (عليه السلام): إِذَا لَمْ يَكُنْ مَا تُرِيدُ فَلَا تُبَلْ کیف مَا كُنْتَ.

Imam Ali ibn Abi Talib (as): If what you aim at does not come about then do not worry as to what you were