Where does my help come from? My help comes from the Lord; Psalm 121

Psalm 121:1-8
Lift up my eyes to the hills - where does my help come from? My help comes from the Lord, the Maker of heaven and earth.
The Lord watches over you - the Lord is your shade at your right hand; the sun will not harm you by day, nor the moon by night.
The Lord will keep you from all harm - he will watch over your life; the Lord will watch over your coming and going both now and forevermore.
Those who trust God know where to turn in trouble. With God to guard them they can come to no harm.
Hills/mountain: they may signify(表示) danger, or the reference may be to the Temple hill and God's presence.
Why?
Trust in the God know where to turn in trouble.
And God will protect us where we coming and going.
God's protection, keep us from harm all day long and forever if we trust in the Lord.
How wonderful to be son of the Lord!
How?
Dear Lord, please blesses my heart and walking on the way of righteousness and  having a pure heart.