If we desire the blessing promised to the obedient, we must observe the Sabbath more strictly. I fear that we often travel on this day when it might be avoided. In harmony with the light which the Lord has given in regard to the observance of the Sabbath, we should be more careful about traveling on the boats or cars on this day. In these matters we should set a right example before our children and youth. In order to reach the churches that need our help, and to give them the message that God desires them to hear, it may be necessary for us to travel on the Sabbath; but so far as possible we should secure our tickets and make all necessary arrangements on some other day. When starting on a journey we should make every possible effort to plan so as to avoid reaching our destination on the Sabbath.
When compelled to travel on the Sabbath we should try to avoid the company of those who would draw our attention to worldly things. We should keep our minds stayed upon God and commune with Him. Whenever there is opportunity we should speak to others in regard to the truth. We should always be ready to relieve suffering and to help those in need. In such cases God desires that the knowledge and wisdom He has given us should be put to use. But we should not talk about matters of business or engage in any common, worldly conversation. At all times and in all places God requires us to prove our loyalty to Him by honoring the Sabbath.
— E.G. White, 6 Testimonies, pp. 359-360
Keep Reading: The Observance of the Sabbath: Sabbath Meetings