How can God be with every person at the same time?
Here's the answer:
God has no limits, so He can be anywhere and everywhere He pleases.
God is not like us. He is altogether greater and one of a kind. God created people with bodies that can only be in one place at one time. But God is not a created being. He is the One who has always been! God is all-present—omnipresent—in all places at all times.
If God were not omnipresent, we would not be sure if He were listening to our prayer or helping a boy in Timbuktu!
But God has no limits! So Christians can trust and pray to Him at anytime since He is always present. If you are a child of God through Jesus Christ, you never need to fear! God is always with you.
"And you can be sure that I am always with you, to the very end" (Matthew 28:20b).
"God has said, 'I will never leave you. I will never desert you'" (Hebrews 13:5b).
"Even though I walk through the darkest valley, I will not be afraid. You are with me. Your shepherd's rod and staff comfort me" (Psalm 23:4).