"For we have not an high priest which cannot be touched with the feeling of our infirmities; but was in all points tempted like as we are, yet without sin. Let us therefore come boldly unto the throne of grace, that we may obtain mercy, and find grace to help in time of need." (Hebrews 4:15-16)
The Lord Jesus Christ is able to help in every time of need for two reasons. First, as the Creator, He is fully able to do anything. Secondly, He has solved, once and for all, the dilemma of the sin which had separated us from God's holiness, by paying the price Himself for our salvation.
To do that, He had to become man so that He could first overcome temptations such as those to which we succumb. He could not pay the price for man's sin if He were not a man, nor could He pay it if He were a sinner. He must be a man, but a sinless man--a criterion no other man could satisfy.
Therefore, He was tempted in all points as we are. This does not mean, however, that He felt a real inward temptation to sin. He was "tested" under the most extreme circumstances to which humans could be subjected, and He always passed the test. He could never have failed, because He is also God, but now all men, and angels, and devils know that He cannot fail.
Thus, He fully understands every one of our needs, and He is indeed able and willing to help. As we come boldly to receive His amazing grace, we must first "obtain mercy" (v. 16), confessing and receiving forgiveness for our sins (1 John 1:9). Then, we are ready to boldly request grace to help in every other need. Our faithful High Priest has been there before us. He knows (not just "knows about") our problems, and is always there to help, waiting for us to come. Since "he himself hath suffered being tempted, he is able to succor them that are tempted," and can "save them to the uttermost that come unto God by him" (Hebrews 2:18; 7:25). HMM