Because Jesus, God incarnate, was fully human and experienced all the temptations, pain, and struggles of life we know He understands our struggle. Although fully human Jesus was also fully God so He was totally without sin so He could pay the price for our sin. Today it is this God who is calling you into His presence to find mercy and grace to help in your deepest times of need.
For we do not have a high priest who is unable to empathize with our weaknesses, but we have one who has been tempted in every way, just as we are—yet he did not sin. Let us then approach God’s throne of grace with confidence, so that we may receive mercy and find grace to help us in our time of need.
Hebrews 4:15-16 NIV