3:8 I know your deeds. Behold, I have put before you an open door which no one can shut, because you have a little power, and have kept My word, and have not denied My name.

I know your DEEDS;

There is no indication what those deeds are. They must have been OK if the Philadelphians are complemented later in this verse for not denying His NAME. However, there are three "BEHOLD"s that follow in this verse and the next verse.

because you

|—> Little self power
|—> Keeping the Word of God
|—> DO NOT deny Christ's name!