It would be difficult to live a good spiritual life if you do not sense God's presence. Even a single brief encounter with God can make a difference. Catholics do have the advantage of receiving the Holy Eucharist, but the key requisite is that you remain open to the Lord. If you do, he will enter, as he is always knocking on the door of your heart. If you go all out to seek union with God, then in time he will let you know of his presence within you without the slightest doubt. Christ now becomes more real than anyone you can see or touch! As I've said, God is to be experienced, enjoyed, and savored.