There is a vast difference between the tenses of these words. Especially in every day life. I can totally wake up one morning with my focus being on a certain task - however what I end up focusing on through out the day will ultimately be a sigh or a praise as I review that which was focused on at the end of it.. That's a lot. But think of it as a photographer out in the woods - the camera may be focused on on thing, but as the focus is narrowed, ultimately the final picture will show more than what was the original target. Either the complete picture is acceptable - or it is tossed.
I find that my day is off to a better start with a narrow focus - prayer and devotions first. Looking through the right lens...allowing The Lord to bring into that focus what needs to be done done... there is never a "missed moment" when what we have focused on here on earth is seen through The Lord's eyes.
2 Corinthians 4:18 "So we fix our eyes not on what is seen but on what is unseen, since what is seen is temporary, but what is unseen is eternal.