The mind or spirit is enthusiastic, but the body is physically weak or not capable.

आत्मा इच्छुक है, लेकिन शरीर कमजोर है।

English Usage: Despite his determination to finish the marathon, he had to stop because the spirit is willing but the flesh is weak.

Hindi Usage: मैराथन खत्म करने की उसकी दृढ़ इच्छाशक्ति थी, लेकिन उसे रुकना पड़ा क्योंकि इच्छाशक्ति कमजोर थी।