Left: a vehicle 車 (A hand-cart seen from above with axle 丨, loading area 日 and two wheels 二), right: vertical 圣 (A hand 又 is vertically above ground 土)
Mnemonic
Pulling a vehicle by hand over the flat earth (=aligned to the vertical) is easy.
This radical comprises the ground/earth 土 and above a hand 又, to show "vertical". (For vertical itself this kanji 縦 [たて] is used.) The kanji 圣 itself means “holy”, as you hold your hand over the object when blessing it.
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