Know that I love each of you with a committed love that has little to do with emotion. I would do you good and not harm always. What I say is strong to help, not to irritatate or aggravate. Please take it as it is intended.
20 For since the creation of the world God's invisible qualities — his eternal power and divine nature — have been clearly seen, being understood from what has been made, so that men are without excuse. 21 For although they knew God, they neither glorified him as God nor gave thanks to him, but their thinking became futile and their foolish hearts were darkened. 22 Although they claimed to be wise, they became fools
If presence is all it takes:
David's experience is the common one for the Christian that God is present (and God did show up in human flesh in Jesus):
Where can I go from your Spirit?
Where can I flee from your presence?
8 If I go up to the heavens, you are there;
if I make my bed in the depths, you are there.
9 If I rise on the wings of the dawn,
if I settle on the far side of the sea,
10 even there your hand will guide me,
your right hand will hold me fast.
We are seperated from God because of our own sin. God cannot be seen by us because we are sinful and He is Holy. The only way we can experience Him right now in this life is to accept the forgiveness of our sins through the atoning work of Jesus on the Cross for us and repent and call on Him as Lord and Savior. To experience God's presence:
You will seek me and find me when you seek me with all your heart.
29 But if from there you seek the Lord your God, you will find him if you look for him with all your heart and with all your soul.
7 "Ask and it will be given to you; seek and you will find; knock and the door will be opened to you. 8 For everyone who asks receives; he who seeks finds; and to him who knocks, the door will be opened.
Some people God comes to and strikes blind calling them to Himself, like Paul on the road to Damascus. Other people struggle to find Him for years before He comes to them. God isn't what we would call fair, He is Just. It would be a terrible thing to miss Him just because we failed to do our homework. Knowing Him and revealing Him is the point of life. After all we were created to be image bearers.