WHY DO CATHOLICS MAKES THE SIGN OF THE CROSS?

I am a Christian who belongs to the Roman Catholic religion. I was surprised how making the sign of the cross is being questioned, teased and mocked by some anti-catholics. 
Let us admit the fact that there are also some catholics who were asking the same question about the sign of the cross. so why do catholics make sign of the cross on their foreheads? Why do catholic churches decorated with a cross? Why do catholics make this sign as they administer sacraments?

I would like to share with you what Officials of the church have to says about the sign of the Cross (signum crucis).
There are biblical basis referring as to why catholic are making the sign of the cross. We make this sign, we proclaim the message of salvation purchased by Jesus through the cross. The bible clearly states: " For the message of the cross is foolishness to those who are perishing , but to us who are being saved, is the power of God." (1 Cor. 1:18)
The bible also teaches us to be proud of it as the message of the cross is the power of God; read Galatians 6:14
Without which there is no crown for Christians. The cross symbolizes our day to day sufferings. When Peter tried to keep Jesus Christ away from the cross, He called Peter "Satan". So it is clear, Satan is afraid and keeps himself away from the Cross as it is through the Cross that Jesus destroyed the devil's kingdom and saved mankind from the slavery of sin and death.
Cyril of Jerusalem wrote in AD 386: " Let us therefore not be ashamed of the cross of Christ; but though another hide it, do thou openly zeal it upon thy forehead, that the devils may beheld the royal sign and flee trembling far away. Make then this sign at eating, drinking and sitting, at lying down, at rising up, at speaking, at walking: in a word, at every act."
Ephrem of Syria testifies in AD 373: " Make all your actions with the sign of the life giving Cross. Do not go out from the doors of your house till you have signed yourself with the cross. Do not neglect that sign whether in eating and drinking or going to sleep, or in the home or going on a journey. There is no habit to be compared with it. Let it be a protecting wall around all your conduct, and teach it to your children that they may earnestly learn the custom".




I have nothing personal with other sects but my point in posting this article is to share what
Catholics have been taught since early childhood and also share what the Church has to say to defend the Catholic faith.