by Phil Kozlowski, Aleteia, 3/22/19.
St. Augustine in the 4th century offered a perfect summary of why Catholics use a crucifix.
The death of the Lord our God should not be a cause of shame for us; rather, it should be our greatest hope, our greatest glory. In taking upon himself the death that he found in us, he has most faithfully promised to give us life in him, such as we cannot have of ourselves.
He loved us so much that, sinless himself, he suffered for us sinners the punishment we deserved for our sins. How then can he fail to give us the reward we deserve for our righteousness, for he is the source of righteousness? How can he, whose promises are true, fail to reward the saints when he bore the punishment of sinners, though without sin himself?
Brethren, let us then fearlessly acknowledge, and even openly proclaim, that Christ was crucified for us; let us confess it, not in fear but in joy, not in shame but in glory.