It's okay to have many failures in your life. There's value in learning to face challenges.
この場合、次のような言い方ができますよ。
ーIt's okay to have many failures in your life. There's value in learning to face challenges.
「人生何度失敗しても大丈夫。試練に直面することを学ぶことに価値がある」
to have many failures「多くの失敗をする」
to face challenges「試練に直面する」
ご参考まで!