grieving our sin

Samuel Zwemer, poet, scholar, missionary to Islam carried The Private Devotions of Lancelot Andrewes from country to country as he traveled.   It was his favorite devotional.   Lancelot Andrewes had both a deep sense of his sin and a deep love for Christ and his sacrifice.   These two go together and are the perfect antidote to the Muslims' excusing of sin and dismissing the need for a blood sacrifice. I want a deeper repentance too.  Here is a quote from one of the prayers of Lancelot Andrewes:

To Thee, O Lord, I confess, because, if I would, I cannot conceal: to Thee my very many, my very great, my very heinous sins. I profess also to grieve, as Thou knowest. But I need more grief: I plainly need it. I am far from that which I ought to have. I can sin much; I cannot repent much. Woe is me for my dryness, my dryness; I cannot much: I would much. I know that even much is not enough. Would that I had such grief, or even more; but of myself I cannot obtain it: I am dried up, I am dried up like a potsherd: woe is me. Thou, O Lord, increase the fountain of tears that I have; supply that I have not; give me a molten heart, unutterable groans. Meanwhile, since my mind is willing, accept me according to that I have, not according to that I have not.