The speaker in "Runaway" is something like a gentle guardian, and the surprise is who that guardian turns out to be. Midway through, the speaker says, "I am a part of your past." So the comforting voice seems to be the listener's own memory, offering a place to hide from present troubles and promising to guide them through sleep.
What makes the poem feel honest is that this comfort has limits. The speaker admits to holding "some of the things you wish you could leave behind" and refuses to hide anything, even if the listener begs. Rest here means facing what you know, not forgetting it. The advice to "be wary, but go forth proudly" sums up the balance: carry your experience as armor, not as a burden.
The mood is soft and lullaby-like, with a quiet steadiness. The final line, calling the listener "little runaway," feels tender rather than critical, and it ends on hope for tomorrow.