Giving your life to God is simple but it is not easy. It is filled with life, but requires death (you must spiritually die to yourself many times before you physically die!). This is why so many people reject the Most Holy Trinity. They don't want the hard work. They want their life on earth to be filled with the things that pass away over time.
St. John the Theologian, in the Book of Revelation 10:9-11, demonstrates what a difficult time people can have accepting the word of God.
"So I went to the angel and told him to give me the little scroll; and he said to me, ‘Take it, and eat; it will be bitter to your stomach, but sweet as honey in your mouth.’ So I took the little scroll from the hand of the angel and ate it; it was sweet as honey in my mouth, but when I had eaten it, my stomach was made bitter. Then he said to me, ‘You must prophesy again about many peoples and nations and languages and kings'."
All of humanity is born into a divine life. Along the way, we get distracted, we get lazy, we get tired, and we get frustrated. That's to be expected. But we can't give up.
Those that have been called in faith have to be willing to swallow that scroll over and over. Even when it upsets our stomach, we must be willing to take that scroll from the angels again and again. For we have been called to prophesy to our generation!