'Be of Good Cheer' in the Bible

“If I say, ‘I will forget my complaint,I will leave off my sad appearance, and be cheerful and brighten up,’

I have told you these things, so that in Me you may have [perfect] peace. In the world you have tribulation and distress and suffering, but be courageous [be confident, be undaunted, be filled with joy]; I have overcome the world.” [My conquest is accomplished, My victory abiding.]