The church people was afraid because People that began to believe scientific ideas, then people will start to question the church and then it will make people not believe key elements of the faith. Also church officials thought that if people did start believing scientific ideas then it will threaten the power influence of the church
one reason was because the scientific ideas contradicted with church teachings. Church office shows fear the scientific ideas would threaten the powerful influence of the church.
Conquering the mighty Persian empire and others and thus creating one of the largest empires ever. He was King of all Greek nations, Shah of Persia, Pharaoh of Egypt and ruler of many more lands.