Meaning
Burning; inner fire, fervour, pathos.
How Iqbal uses it
The heat that makes verse and life alive. A breast lit with soz makes poetry the very essence of life; without that inner burning, speech is a living death. The “soz-e-darun,” the burning within, is what distinguishes a real self from a hollow one.
See it in the verse
Soz in Iqbal’s couplets
Siina raushan ho to hai soz-e-sukhan ain-e-hayat
Ho na raushan to sukhan marg-e-davam ai saqi
Ho na raushan to sukhan marg-e-davam ai saqi
If the heart is lit within, the fire in one's words is life itself; if it is unlit, those words are a lasting death.
Self-Knowledge · Action · Love
Wajud-e-zan se hai tasveer-e-kaenat mein rang
Isi ke saaz se hai zindagi ka soz-e-darun
Isi ke saaz se hai zindagi ka soz-e-darun
It is the presence of woman that gives colour to the portrait of the universe — from her instrument comes the inner fire of life itself.
Love · Unity · Humility
Ragon mein gardish-e-khun hai agar to kya hasil
Hayat soz-e-jigar ke siwa kuchh aur nahin
Hayat soz-e-jigar ke siwa kuchh aur nahin
If blood merely circulates in your veins, what of it? Life is nothing but the burning of the heart.
Love · Awakening · Restlessness