This is the 5870th most frequent Japanese word.
ほかなら
"Nothing but" or "none other than."
In this sentence, 'ほかなら' is used to emphasize that the success originates exclusively from effort, with no other contributing factor.
この成功は努力の結果ほかならない。
This success is nothing but the result of effort.
Here, 'ほかなら' expresses that his actions stem solely from his beliefs, rejecting any alternative cause or motivation.
彼の行動は彼自身の信念によるものほかならない。
His actions are nothing but the result of his own beliefs.
In this context, 'ほかなら' is used to stress that the outcome is due entirely to the collective cooperation of everyone involved.