The Lord is my shepherd; I shall not want.
He maketh me to lie down in green pastures: he leadeth me beside the still waters.
He restoreth my soul: he leadeth me in the paths of righteousness for his name’s sake.
Yea, though I walk through the valley of the shadow of death, I will fear no evil: for thou art with me; thy rod and thy staff they comfort me.
Thou preparest a table before me in the presence of mine enemies: thou anointest my head with oil; my cup runneth over.
Surely goodness and mercy shall follow me all the days of my life: and I will dwell in the house of the Lord for ever.

COMMENTARY

The Lord is my shepherd; I shall not want.
He maketh me to lie down in green pastures
He restoreth my soul
He preparest a table before me
He anointest my head with oil
My cup runneth over
I will dwell in the house of the Lord for ever
Psalm 23 describes what is the great desire of us all: to feel so meticulously cared for by the Lord, so provided for in all our needs. Each of us should feel that He really is our good shepherd.
But there can be barriers to receiving such opulent care. The Lord cannot be our caring shepherd if we do not elect to be His sheep. And we fail to be His sheep when we are not willing to fully rely on Him.
This might come in the form of depending on the testimony of others instead of seeking out our own. When we believe simply because our parents or pastor believed, then we make them into our shepherd instead, depending on them as an intermediary between us and God. This might also come in the form of saying we do not need anyone. We are our own shepherd, already having all the answers and perfectly capable of providing for ourselves. This mentality pushes away anyone, God included, who might have been a help to us.
Of course friends and mentors are good, and self-reliance is good, too. But each can be taken to an excess. Better to have each built on the foundation of our relationship to God and not the other way around.