Since my youth, God, you have taught me,
and to this day I declare your marvelous deeds.
18 Even when I am old and gray,
do not forsake me, my God,
till I declare your power to the next generation,
your mighty acts to all who are to come. PSalm 71:17,18
Lillie-Put 
Some of God’s mighty acts (in my own opinion):
Giving man reason and compassion (not that I think those get a lot of use sometimes)
Giving us free will (agency)
Loving us in spite of our flaws
Giving His son to us to set a perfect example
I could go on. I see miracles from God’s hand each day if I care to look, and I am humbled by His blessing and care. Thanks Joseph for asking a great question!
I am so glad you answered Melanie. Great answers. That free will thing is both a wonderful gift a mighty act and very problematic for us humans.