Let’s go direct to them, everyone knows about Shiva, no need to describe Him.

Lord Shiva sitting on the block of ice: the homeless nature of an accomplished yogi shows that the all the universe is his home, he can live anywhere as he wants.

Lord Shiva wearing ash: this ash shows detachment, as everything lastly turns in ashes, back to its elements. Ash shows nothing is permanent, things exist just in transition and there is no need to get attached with them.

His trident: it shows three gunas: Satoguna, Rajoguna and Tamoguna. It shows a man should raise himself above these gunas, as they are the creation of the mind, and to settle himself in nirguna state, where no mind but the God only exists.

His damru: when it is played, its beat represents the Omkara, the primordial ever-pervading sound.

Ganga over his head: it shows purification, divinity and wisdom.

Tigor or Lion skin: Shiva sits over the skin, it shows control over senses and desires.

Cobra and other snakes around his neck, hands and waist: they show the control over violence and