Was he indeed greater than us?
"By faith Abraham, when he was called to go out into a place which he should after receive for an inheritance, obeyed; and he went out, not knowing whither he went.
By faith he sojourned in the land of promise, as in a strange country, dwelling in tabernacles with Isaac and Jacob, the heirs with him of the same promise:
For he looked for a city which hath foundations, whose builder and maker is God." Heb 11:8-10
But what of this?
"Verily I say unto you, Among them that are born of women there hath not risen a greater than John the Baptist: notwithstanding he that is least in the kingdom of heaven is greater than he." Matt 11:11
Are we in, or to be in, the kingdom of heaven? If we are then are we not greater than Abraham and if we are not then...?
How would you measure a person's faith to determine if it compares with that of Abraham? You are looking for something that, I believe, you should not:
"For we dare not make ourselves of the number, or compare ourselves with some that commend themselves: but they measuring themselves by themselves, and comparing themselves among themselves, are not wise." II Cor 10:12
And then again is not our yardstick higher even than Abraham could possibly attain to before Jesus paid the price and the Holy Ghost was poured out?
If there is, or is to be, a yardstick for us, is it not seen in the One we are striving to be like according to the promise given:
"Verily, verily, I say unto you, He that believeth on me, the works that I do shall he do also; and greater works than these shall he do; because I go unto my Father." John 14:12
Why would you presume that those greater works must be in miracles similar to the physical healings Jesus performed during his 3½ year ministry? Are there not greater things that God has done and is doing in you and in me and in others?
"But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth." Acts 1:8
Have you by the scriptures... or by any other means identified exactly how this power is to be manifested?
"But as it is written, Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love him." I Cor 2:9
"Beloved, now are we the sons of God, and it doth not yet appear what we shall be: but we know that, when he shall appear, we shall be like him; for we shall see him as he is." I John 3:2
Go back to the lowest room and go on from there. Deciding have done, are doing, or should be doing is whose job? Yours?