What a great peace this gives to the believer. This should give you a great peace. And the peace of God, which passeth all understanding, shall keep your hearts and minds through Christ Jesus. The Lord is my shepherd and you will always be refreshed and want for nothing. The Lord teaches the believers that fullness is theirs.
Green pastures symbolize prosperity and wellness.
The Shepherd teaches us to rest in His fullness. He gives us everything we need and stills the waters before us. The Shepherd removes all our problems and causes our fear to vanish. The still waters symbolizes a life free of problems and troubles. You shall not want for anything with the Lord as your Shepherd.