We pray most of the time in silence, we do not always kneel, but place our hands togather, usually bow our heads and address God first. Sometimes we say formal prayers, and sometimes we make a Confession, and sometimes we talk with God about issues in our lives or the day. Sometimes we pray outloud, when we say grace, or pray as a group, its a different kind of prayer in a way.
What about when we are just thinking, or having thoughts in our minds through out the day? Is that also a prayer? When we silently think, I hope the car starts, or the weather is nice, or we do our best where we are headed, are those also not prayers? We don't need to talk to ourselves, so when we have those kind of thoughts, are we not praying to God for things to work out right that day? We are either thanking God for blessings or asked God for help or guidance with our thoughts. Without really giving thought to it, we live with God in our lives everyday, otherwise what purpose is there for thoughts, we know the answers to already. We know the car will start, we will do good that day, and that the weatherman already told us the forcast. Yet we still silently coorespond with God everyday with silent thoughts and reactions, such as the test or interview going well, Thank You God I passed my test. We get someplace without traffic accidents happening in bad weather, we are thankful for, or we forgot our jacket and the 2 minute delay avoided a crash just ahead of you. Our silent thoughts are usually one directional, since we do not answer ourselves and say back "Don't worry the car will start", so are we really praying in our minds with our quiet thoughts, including God in our daily activity? Maybe this is all part of everyones personal relationship with God on a daily basis. Certainly no way to proove otherwise by any scientific test.