I love AA’s slogans (One Day At a Time, Easy Does It, Let Go, Let God, etc.) -- I love simple slogans that can define a philosophy of life in words that can fit on a Tshirt!
Here are some of my favorites -- feel free to add your own:
Live Simply, Simply Live
It Is What It Is
If Nothing Changed, There Would Be No Butterflies
Every Day is a Gift, Untie The Ribbons
God Doesn’t Give Us What We Can Handle; God Helps Us Handle What We Are Given
Let Us Be Silent That We May Hear The Whisper of God (Ralph Waldo Emerson)
There is Always Something To Be Thankful For
When You Stumble, Make It Part Of The Dance
Find Joy In Your Journey
Life Is What You Make It; Always Has Been, Always Will Be (Grandma Moses)
Faith Is Not Believing That God Can, It’s Knowing that He Will
These last two are a little too wordy for a Tshirt, but I love them anyway:
I have been driven many times upon my knees by the overwhelming conviction that I had nowhere else to go (Abraham Lincoln)
Be careful of your thoughts, Thoughts become words; Be careful of your words, Words become actions;Be careful of your actions; Actions become character; Character is everything