Revelation Chapter 3, Verse 4 (NIV)

^3:4 Yet you have a few people in Sardis who have not soiled their clothes. They will walk with me, dressed in white, for they are worthy.

Yet you have a few people in Sardis who have not soiled their clothes.

The FEW often seems to be the case....we are mostly followers or indifferent. It was true in Luke's time. Zacharias and his wife Elizabeth because they "walked blamelessly" (Luke 1:5-6) were given the privilege of being the parents of John the Baptist, the announcer and baptizer of Jesus Christ. Simeon, a "righteous and devout" man was one of the FEW who knew he would see the Lord's Christ before he died (Luke 2:25-26). And then there was Anna, a widowed prophetess, who for many years "never left the temple". She was given the task of speaking to all around that the Jesus is the redeemer of Jerusalem (Luke 2:36-38) that everyone was looking for.

But these instances are not that unusual. Even in very ancient times, it is recorded (Genesis 6:5-12), that Noah found favor in the eyes of the Lord because he was a righteous man and blameless in his time. The rest of mankind's wickedness was very great.

the 144,000 Jewish witnesses were blameless (Revelation 14:5)
Food we eat does not matter, it is one God that matters (1 Corinthians 8:4-8).
Cleanse ourselves from all defilement of flesh and spirit...(2 Corinthians 7:1).
we should maintain the simplicity and purity of devotion to Christ (2 Corinthians 11:1-3).
have mercy with fear on those whose garments are polluted by the flesh (Jude 22-23).

They will walk with me, dressed in white,

The white garments are symbols of righteousness, victory, and the glory of God:

in the advice to Laodicea, they were to buy white garments to cover the shame of their wickedness (Revelation 3:18).
the great tribulation martyr's robes were white (Revelation 6:11).
all redeemed saints around the Throne wore white robes (Revelation 7:9)
the ones out of the great Tribulation had their robes washed white in the blood of the Lamb (Revelation 7:14)
the heavenly armies are wearing white (contrast that with today's armies in camouflage!) (Revelation 19:14)

for they are worthy.

The faithful FEW in Sardis would walk with Him in white for they are WORTHY. No need to blame it on the church or to be a martyr to wear white; it is your own heart and life condition which will determine whether your garment is pure white or soiled. Being WORTHY is rare indeed. For example, Christ was the ONLY one WORTHY to open the seals on the scroll held in the right hand of the One on the THRONE. Read about it starting in Revelation 5:1.