I believe in what Mufti Ismail Menk has said :

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When things do not go exactly the way we wanted ,

When we do not achieve what we have tried so hard to achieve

When we feel so let down by others.....

Then always know that for as long as we have faith and trust in the Almighty, He definitely has something better in store for us. He has saved us from a calamity or disaster that would have been in our path or has elevated our status through surrendering to His decree. We are not considered believers until we are pleased with the decision of the Almighty. This will save us from much anxiety and depression. Try your best and leave the rest to Him. Only Him, Allah.