take one's courage in both hands

idiomatic

(idiomatic) To summon up one's courage in readiness for a difficult or dangerous action.

Japanese Meaning

困難や危険な行動に向けて、意を心に決め、勇気を奮い起こすこと。 / 思い切った行動を起こすために、勇気を振り絞ること。

One must sometimes take one's courage in both hands and tell the truth, no matter how frightening it seems.

時には人は勇気を振り絞って、どんなに怖くても真実を話さなければならない。

Sense（1）

(idiomatic) To summon up one's courage in readiness for a difficult or dangerous action.