For thou writest bitter things against me, and makest me to possess the iniquities of my youth.
Writest - a judicial phrase, to note down the determined punishment. The sentence of the condemned used to be written down (Isaiah 10:1; Jeremiah 22:30; Psalms 149:9). (Umbreit.)
Bitter things - bitter punishments.
Makest me to possess - or inherit. In old age he receives possession of the inheritance sin thoughtlessly acquired in youth. 'To inherit sins' is to inherit the punishments inseparably connected with them in Hebrew ideas (Psalms 25:7).