The whispering and laughing and talking which might be without sin in a common business place should find no sanction in the house where God is worshiped. {5T 492.2}
The flippant words that fall from his lips, the trifling anecdotes, the words spoken to create a laugh, are all condemned by the word of God and are entirely out of place in the sacred desk. {TM 142.2}
Context is important.
More context:
What can the minister do without Jesus? Verily, nothing. Then if he is a frivolous, joking man, he is not prepared to perform the duty laid upon him by the Lord. "Without Me," says Christ, "ye can do nothing." The flippant words that fall from his lips, the trifling anecdotes, the words spoken to create a laugh, are all
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condemned by the word of God and are entirely out of place in the sacred desk. {TM 142.2}
I tell you plainly, brethren, unless the ministers are converted, our churches will be sickly and ready to die. God's power alone can change the human heart and imbue it with the love of Christ. God's power alone can correct and subdue the passions and sanctify the affections. All who minister must humble their proud hearts, submit their will to the will of God, and hide their life with Christ in God. {TM 143.1}
What is the object of the ministry? Is it to mix the comical with the religious? The theater is the place for such exhibitions. If Christ is formed within, if the truth with its sanctifying power is brought into the inner sanctuary of the soul, you will not have jolly men, neither will you have sour, cross, crabbed men to teach the precious lessons of Christ to perishing souls. {TM 143.2}
It appears to me that this does not speak against such an event as for instance when Ellen would comment her son sleaping, but rather the kind of preacher who has nothing to say and therefore replace substance with jokes.
When the worshipers enter the place of meeting, they should do so with decorum, passing quietly to their seats. If there is a stove in the room, it is not proper to crowd about it in an indolent, careless attitude. Common talking, whispering, and laughing should not be permitted in the house of worship, either before or after the service. Ardent, active piety should characterize the worshipers. {5T 492.1}
If some have to wait a few minutes before the meeting begins, let them maintain a true spirit of devotion by silent meditation, keeping the heart uplifted to God in prayer that the service may be of special benefit to their own hearts and lead to the conviction and conversion of other souls. They should remember that heavenly messengers are in the house. We all lose much sweet communion with God by our restlessness, by not encouraging moments of reflection and prayer. The spiritual condition needs to be often reviewed and the mind and heart drawn toward the Sun of Righteousness. If when the people come into the house of worship, they have genuine reverence for the Lord and bear in mind that they are in His presence, there will be a sweet eloquence in silence. The whispering and laughing and talking which might be without sin in a common business place should find no sanction in the house where God is worshiped. The mind should be prepared to hear the word of God, that it may have due weight and suitably impress the heart. {5T 492.2}
This obviously is concerned with behaviour in the church of congregation and pastor. The point appear to be, 'you are in church for one purpose only, to meet with God, and whatever else you may want to do should be done outside of the church'. This might be a problem with Ellen commenting on her sons sleap.