"Heresy is from the Greek word meaning 'choice'.... But we are not permitted to believe whatever we choose, nor to choose whatever someone else has believed. We have the Apostles of God as authorities, who did not...choose what they would believe but faithfully transmitted the teachings of Christ. So, even if an angel from heaven should preach otherwise, he shall be called anathema."
"If a man wants to be always in God's company, he must pray regularly and read regularly. When we pray, we talk to God; when we read, God talks to us."
For more on St. Isidore and additional maxims, head to Catholic-Forum at this LINK from the Patron Saint Index
Hmm, St. Isidore, Patron of the Internet...Follow this LINK.
Isn't it great....a "Prayer before logging onto the internet" at this LINK.