Through luck and strength of will, he chose the latter.
Times, Sunday Times
It's the pride a person takes in his own strength of will.
Times, Sunday Times
If he chooses not to co-operate he had the personal qualities and strength of will to maintain his story indefinitely.
Times, Sunday Times
They had such strength of will that they managed to win against all odds.
Times, Sunday Times
In love, you mix kindness with the strength of will that gets results, so any delays to a shared deal can finally end.
The Sun