This is absolutely true.
But then again, so is this...
“Better yet, go to where doors are CLOSED!”
The concept of taking the Gospel where God opens doors is straight out of the Bible:
Matthew 10:14, 23 (NKJV)
And whoever will not receive you nor hear your words, when you depart from that house or city, shake off the dust from your feet…
When they persecute you in this city, flee to another. For assuredly, I say to you, you will not have gone through the cities of Israel before the Son of Man comes.
Acts 16:6 (NKJV)
Now when they had gone through Phrygia and the region of Galatia, they were forbidden by the Holy Spirit to preach the word in Asia.
Acts 19:8-10 (NKJV)
And he went into the synagogue and spoke boldly for three months, reasoning and persuading concerning the things of the kingdom of God. But when some were hardened and did not believe, but spoke evil of the Way before the multitude, he departed from them and withdrew the disciples, reasoning daily in the school of Tyrannus. And this continued for two years, so that all who dwelt in Asia heard the word of the Lord Jesus, both Jews and Greeks.
1 Corinthians 16:9 (NKJV)
For a great and effective door has opened to me, and there are many adversaries.
2 Corinthians 2:12 (NKJV)
Furthermore, when I came to Troas to preach Christ’s gospel… a door was opened to me by the Lord.
Revelation 3:8 (NKJV)
I know your works. See, I have set before you an open door, and no one can shut it; for you have a little strength, have kept My word, and have not denied My name.
This is absolutely true.
But then again, so is this...