How can you see the Siratal al-Mustaqim?

The human being is like the water of the river:

when it becomes turbid, you can't see to the bottom.

The bottom of the river is full of jewels and pearls:

pay attention, don't stir up the water,

for originally it's pure and free from pollution.

The human spirit resembles the atmosphere:

when air is mixed with dust, it veils the sky,

and prevents the eye from seeing the sun;

but when the dust is gone, the air once again becomes pure.

Despite your complete darkness,

God may offer you visions,

that you might find the way of deliverance.

Mathnawi IV: 2482-2486
Version by Camille and Kabir Helminski
"Rumi: Jewels of Remembrance"
Threshold Books, 2000, p. 75