It takes effort. You need to learn how to listen. (how to do that is in Does God Answer Prayers? ). You need to begin to truly "see" and "hear". You need to begin to notice the things the Lord has given you and be grateful (The Earth Testifies of God, God Helping Me Find the Right Place to Live, Protected, Enduring Love, Coming to Know God, New Opportunities, Being Helped, One Year, Guided and Blessed by The Lord, Roommates Teaching Me about Family Prayer,). You need to study others' experiences (People Testify of God). You need to exercise enough faith to try out His commandments. As we live them, from our own experience we learn that they are good and help our lives to be happier. As we gain knowledge about one principle, then we have more faith to try out another principle. For instance, seeing how paying tithing (returning 10% of all the Lord gives me to Him) has helped us manage our money better and get out of debt, helped me have the faith to volunteer to teach the young children in church. Living the Word of Wisdom (God's laws of health) has given me the faith to pray for help in learning how to live with Addison's Disease. Each thing I do gives me knowledge that that principle is true and the faith to test out another principle. It also increases my faith in my Savior who has given these commandments to help me be happier.
Coming to know God is a life long process not a single event. It has been compared to planting a seed. When it grows you know the seed was good.
And now, behold, is your knowledge perfect? Yea, your knowledge is perfect in that thing, and your faith is dormant; and this because you know, for ye know that the word hath swelled your souls, and ye also know that it hath sprouted up, that your understanding doth begin to be enlightened, and your mind doth begin to expand. Alma 32:34
You now know for yourself that the seed (the Gospel teachings) is good, but do you know that it will produce fruit (peace in this life, happiness, and eternal life)? No.
But if ye will nourish the word, yea, nourish the tree as it beginneth to grow, by your faith with great diligence, and with patience, looking forward to the fruit thereof, it shall take root; and behold it shall be a tree springing up unto everlasting life. Alma 32:41
You can not know true principles until you live them. It is by our own experiences that our faith grows. If we do not nurture our faith, then our "tree" will wither and die.
Now, this is not because the seed was not good, neither is it because the fruit thereof would not be desirable; but it is because your ground is barren, and ye will not nourish the tree, therefore ye cannot have the fruit thereof. Alma 32:39
I heard of a woman who worked for a seed company. People would complain to her that the seeds were not good.
“The seeds don’t work,” the customer said. “I bought them two months ago and still nothing.”
Are we living the law of the harvest or are we impatiently demanding the harvest without the planting or tending. Coming to know God takes time and effort, but it will come with diligence and patience.
Some people have stated that if there really was a God, He should show Himself to them, then they would believe. I wonder if they don't even have enough faith to pray and read the scriptures, could they possibly have the spiritual strength to live God teachings? What would happen if you have had an experience where you actually saw God, but were not ready to live his teachings? One prophet explained the consequences:
We can not demand that God appear to us any more than we can demand a degree from a college, a job, a loving family, or happiness in this life. All must be earned. We are talking about the privilege of coming to know the great King of Heaven, a God, a being with all power and knowledge. He does not have to prove anything to us. Coming to know God is not something we can demand. It is a privilege we humbly receive if we are willing to pay the price.
This is the promise we are given: