百尺竿頭
also: ひゃくしゃくかんとう
Meanings
1
the highest state of enlightenment; the pinnacle of attainment
A yojijukugo from Zen Buddhism, often used metaphorically for reaching the ultimate level in any endeavor. The literal image is 'the tip of a hundred-foot pole,' suggesting a state beyond which one must still step forward.
After years of training, he finally reached the highest state of enlightenment.
One must be prepared to take a step forward even from the pinnacle of attainment.