I believe in God
My testimony, or witness
What I know
There is one God: he is the Heavenly Father of all the people on earth, and loves and nurtures us as his children. His desire and glory is to bless us, watch us progress, and lead us to grow into joy here on earth and after we die to live in heaven with Him. God's Son, Jesus Christ, lived a perfect life, taught us the way we should live, and took on Himself our sins and mistakes. Then He rose from death, ascended back to His Father, and led the way to hope.
As a loving parent, God gives us directions— commandments— in our actions and our motivations. When we follow His directions— obey His commandments— we grow spiritually, because it is not easy! It is like exercise to a muscle. The more we grow, under His direction, the more like Him we become: the more fit for His presence, and the more clearly we hear Him. The stronger we become in heeding and following God, the better we do it and the more joyful it becomes.
Some hear God more clearly than others. God calls prophets, who relay God's word and lead His work here on earth. In fact, there is a prophet now, named Russell M. Nelson. He leads The Church of Jesus Christ of Latter-day Saints, relaying God's word to the Church and to the world.
Why I know this
I know these things because I've felt them.
Layer on layer, the things I have done and felt throughout my life leave me sure and convinced of God and His Christ. Unlike Paul, I saw no light and I heard no great voice. But time and again, in deepest sorrow or joy, or other time when I don't expect it, I have felt the touch on my heart reassuring me that God knows me. He knows what I do, say, intend, or think, and He loves me and wants me to succeed. In my best times and in my worst times, Jesus Christ is my Savior and by Him I come back.
The scientific method is based on doubt and repeated inquiry: keep picking and poking, and watching what it does, and underlying patterns will emerge to your eye (or other instrument). My knowledge here isn't based on science. If I want to build a rapport or understanding with someone, I'll treat that person with respect and work by his or her rules, not just mine. Heavenly Father invites each of us to approach Him and come to know Him, to live by His ways. The more I do this, the more my respect and reverence grows and the better I know and trust Him.
Knowing, what do I do?
I do my best to follow the commandments of God. As Jesus taught, the first and greatest is to "love the Lord thy God with all thy heart and with all thy might and with all thy strength;" to me this also involves doing what God says to do. The second commandment, to "love thy neighbor as thyself," sometimes gets difficult, but the more I work to honor it the better I feel.
I participate in church and try to be a good person according to what I know. And to my astonishment, it gets more enjoyable as I keep working. Things that used to be really hard are now doable; new challenges become apparent as my spiritual vision clears. So since I know, I just keep doing my best, having faith that this will be enough.