To make the fastest progress,
Be an absolutely cheerful
Hero-warrior
And take both victory and failure
As parallel experience rivers
Leading to the sea
Of progress-delight.

Remain cheerful,
For nothing destructive can pierce through
The solid wall of cheerfulness.

If failure has the strength to turn your life into bitterness itself, then patience has the strength to turn your life into the sweetest joy. Do not surrender to fate after a single failure. Failure, at most, precedes success.

In between your failure-tree
And your triumph-tree,
The tree that is growing
Is known as your patience-tree.

It is defeat which makes victory meaningful

The word "impossible" is only in the mind
And not in the heart.
If we can remain in the heart,
There will be no end to our progress.