My guilt has ovetrwhelmed me like a burden too heavy to bear.

For David, this overwhelming burden of guilt is conviction of sin.  Because of the cross, our Saviour, Jesus has relieved us from this burden. It is no longer overwhelming.  There will be other burdens to carry in this life, but He will not forsake us.  Whether the burden that overwhelms is dibilitating disease, a struggle with life and godliness, or emotional and mental fatigue,  He is always with us to give hope, help and comfort.