My best thought...

When I am tired in my occupation. When I am tired of my earthly endeavors, when I am tired of my own failures in life, or my very own lack of ability to truly be good. It's when I'm at the end of myself, when I am supremely glad to remember these words from this old Scottish Hymn..

"Thou my best thought, by day or by night. Waking or sleeping, Thy presence, my light."

Whatever my thoughts are in a day, the best thought I can have is of Him. The thought of His person. His Forgiveness, His Word, His Grace, His Love for me.

Another great Hymn that perfectly describes my feelings, and experience are noted here...

I look to thee in every need,
And never look in vain
I feel thy strong and tender love,
And all is well again:
The thought of thee is mightier far
Than sin, and pain, and sorrow are.

Discouraged in the work of life,
Disheartened by its load,
Shamed by its failures or its fears,
I sink beside the road;
But let me only think of thee,
And then new heart springs up in me. 

Thy calmness bends serene above,
My restlessness to still;
Around me flows thy quickening life,
To nerve my faltering will:
Thy presence fills my solitude;
Thy providence turns all to good.

Embosomed deep in thy dear love,
Held in thy law, I stand;
Thy hand in all things I behold,
And all things in thy hand;
Thou leadest me by unsought ways,
And turn'st my mourning into praise.

Amen.

- Samuel Longfellow (1819 - 1892)