Philippians 2:14-16

Do all things without grumbling or questioning, 15 that you may be blameless and innocent, children of God without blemish in the midst of a crooked and twisted generation, among whom you shine as lights in the world, 16 holding fast to the word of life, so that in the day of Christ I may be proud that I did not run in vain or labor in vain.

Do all things (from the immediately preceding context):

- Be of the same mind (v. 2)

- Have the same love (v. 2)

- Be in full accord (v. 2)

- Be of one mind (v. 2)

- Count others more significant than yourselves (v. 3)

- Look to the interests of others (v. 4)

- Have the mind of Christ (v. 5)

- Be a servant (v. 7)

- Be humble to the point of death (v. 8)

- Confess that Jesus Christ is Lord (v. 11)

- Obey (v. 12)

- Work out your own salvation (v. 12)

Grumbling seems pretty clear; although the KJV's "murmurings" is more colorful and subtle. When I think of grumbling versus murmuring, I think of volume. Grumbling is louder. Murmuring is quieter, but it is still wrong. This falls in line with the principle taught throughout scripture that we need to internalize our Christian walk and not just make it a matter of externals (1 Sa 16:7; Lu 16:15; Joh 7:24; 1 Ch 28:9; Ps 139:2; Jer 31:33; Ro 2:29; Ro 7:22; 2Co 4:16; 1Pe 3:4). There are only 4 verses in the New Testament that use that word (Joh 7:12; Ac 6:1; Php 2:14; 1Pe 4:9).

"Questioning" doesn't seem to convey the idea to me. The KJV's "disputings" is a little better, but the idea I get when looking at the other verses that use that word (Mt 15:19; Mr 7:21; Lu 2:35; Lu 5:22; Lu 6:8; Lu 9:46; Lu 9:47; Lu 24:38; Ro 1:21; Ro 14:1; 1Co 3:20; Php 2:14; 1Ti 2:8; Jas 2:4) is more along the lines of evil thoughts and doubtful things. Doubting for the sake of doubting.

Out of time again!