"But the world's need today cannot be met fully by the ministry of God's servants who have been called to preach the everlasting gospel to every creature. While it is well, so far as possible, for evangelical workers to learn how to minister to the necessities of the body as well as of the soul, thus following the example of Christ, yet they cannot spend all their time and strength in relieving those in need of help. The Lord has ordained that with those who preach the word shall be associated His medical missionary workers—Christian physicians and nurses who have received special training in the healing of disease and in soul winning. CT 468.1"
"Then saith he unto his disciples, The harvest truly is plenteous, but the labourers are few;"
EGW's statement about the need for more workers and the combination of preaching and medical work aligns with the idea of a plentiful harvest but few laborers in Matthew 9:37.
"Medical missionaries and workers in the gospel ministry are to be bound together by indissoluble ties. Their work is to be done with freshness and power. By their combined efforts the world is to be prepared for the second advent of Christ. Through their united labors the Sun of Righteousness is to rise, with healing in His wings, to lighten the benighted regions of the earth, where the people have long lived in gross darkness. Many who are now dwelling in the shadow of sin and death, as they see in God's faithful servants a reflection of the Light of the world, will realize that they have a hope of salvation, and they will open their hearts to receive the healing beams, and will in turn become light bearers to others yet in darkness. CT 468.2"
"But unto you that fear my name shall the Sun of righteousness arise with healing in his wings; and ye shall go forth, and grow up as calves of the stall."
The EGW passage directly quotes and expands upon Malachi 4:2, using the imagery of the 'Sun of Righteousness' and 'healing in His wings' in a similar context.
"Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven."
Both passages connect good works/ministry with reflecting light to others, leading them to God. The EGW passage specifically mentions 'a reflection of the Light of the world,' which aligns with the concept of letting your light shine.