one's abilities
彼はよくできない、自分の能力を最大限に利用していないからだ。
He doesn't do very well because he isn't making the most of his abilities.
彼は自分の能力を確信している。
He is confident in his abilities.
せいぜい自分の能力を活用しなさい。
Make the most of your abilities.
若者は自分の能力を正しく評価できないことが多い。
Young people often fail to accurately assess their own abilities.