Afflictions are light when compared with what we really deserve. They are light when compared with the sufferings of the Lord Jesus. But perhaps their real lightness is best seen by comparing them with the weight of glory which is awaiting us.
Psalm 34:19 ... Many are the afflictions of the righteous: but the Lord delivereth him out of them all.
1 Thessalonians 1:6 ... And ye became followers of us, and of the Lord, having received the word in much affliction, with joy of the Holy Ghost.
2 Corinthians 4:17 ... For our light affliction, which is but for a moment, worketh for us a far more exceeding and eternal weight of glory;❤