2Co 5:17  Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new.

What Jesus has done for us by dying on the cross:

Taken away the curse in the garden:
Gen 3:15-16  And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel.  (16)  Unto the woman he said, I will greatly multiply thy sorrow and thy conception; in sorrow thou shalt bring forth children; and thy desire shall be to thy husband, and he shall rule over thee.

This means that marriage can be blessed for the believer.

Took away the curse of the law found in Deut 28, that includes sickness, disease, poverty, and lack.

Gave us life abundant, to the full, until it overflows.  [John 10:10, Amp]

Gave us peace, a sound mind, and love that is beyond measure.  [John 14:7; Phil 4:7; 2 Tim 1:7; Eph 3:18, 19]

Given us the spirit of revelation of the knowledge of Him [Eph 1:17-19]
We are strengthened in the inner man [Eph 3;16]
We have gained access into the heavenly Holy of holies any time we please.  [Heb 10:19]
This is not meant to be a complete list, but is a start.
Tzelem Ministries
"Created in the image of Him"