力不从心

力不从心 [lì bù cóng xīn]

1. ■ One's strength does not match one's ambitions.; ability falling short of one's wishes; ability not equal to one's ambition; be unable to do as well as one would wish; bite off more than one can chew; far exceed one's power; strength not equal to the will; lacking the ability to do what one would like to do; more than willing but lack the power to ...; One's strength falls short of one's desire [will; wishes].; The spirit is willing but the flesh is weak.; with no physical strength:

我想用英语来谈话， 但是力不从心。 I tried to carry on a conversation in English, but it far exceeded my ability.