My son is 4 years old. He is a sweet, energetic little guy. He is also almost certainly autistic.
Getting that news was really hard at first, but it was something we had suspected for a long time. The professionals told us "He's never going to develop more than what he has..." The funny thing is, we see positive changes just about every day - things parents of "normal" 4 year-olds don't get excited over. Every new word, moment of independent eye contact, instruction followed is a victory for us.
When we have to explain to people (particularly people we don't know) that he is autistic, you can sometimes see a look come into their eyes like "Oh, he's disabled..." That's not how we see him. He is different, certainly, but we are all different (you might even say we're all weird in some way!). God has created each of us uniquely for the unique purpose He has for us. We are all "differently abled". The highest ambition we have for our son is that he would be able to understand his need for a Saviour and to belong to Jesus Christ. In the long run, NOTHING ELSE MATTERS.