Passage
{A Song of degrees.} I lift up mine eyes unto the mountains: whence shall my help come?
{A Song of degrees.} I lift up mine eyes unto the mountains: whence shall my help come?
Psalms 121:1 {A Song of degrees.} I lift up mine eyes unto the mountains: whence shall my help come?
Psalms 121:2 My help [cometh] from Jehovah, who made the heavens and the earth.
Psalms 121:3 He will not suffer thy foot to be moved; he that keepeth thee will not slumber.
The verse centers on "song", "degrees", "lift", "mine", "eyes", "mountains", "whence", and "shall". It is saying that the verse draws attention to "song" and "degrees", so its meaning should be read from those terms before moving to application.
The next verse adds "My help cometh from Jehovah who made...", so "song" and "degrees" should be read forward into that movement. In Psalms context, the local focus is worship, trust, the LORD's kingship, and covenant mercy.
A plain takeaway is to answer the verse's own emphasis on "song" and "degrees" with trust shaped by these words, not by a vague optimism outside the passage.