The book of Jude begins and ends, it seems to me, with references to the past, the present, and the future.
1 Jude, a bond-servant to Jesus Christ, and brother of James, to those who are the called, beloved in God the Father, and kept for Jesus Christ.
I was called by Jesus. I am loved by Him. And I will be kept forever! Past, present, future.
24 Now to Him who is able to keep you from stumbling, and [then] to make you stand in the presence of His glory blameless with great joy.
This verse skips over the past and shows us today and the future. Now, today, God is able to keep me from stumbling. Then (I have added the word "then" to the above verse because it is implied), in the future, when I go to my great reward, He will make me appear unblemished, blameless, and sinless as I stand before God on the day of judgement.
The word tells me that God is the same yesterday, today, and forever. And here I learn that my past is taken care of, my present is covered in love, and my future is secure. What a comfort.