Why Missionary Service?

Why should we participate in missionary service?

We are commanded by God.
Matt 28:19-20 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen.

Evil men are out there purposefully deceiving.
Many are looking but don't know where to find it.
D&C 123: 12 For there are many yet on the earth among all sects, parties, and denominations, who are blinded by the subtle craftiness of men, whereby they lie in wait to deceive, and who are only kept from the truth because they know not where to find it—

It is only fair and just.
D&C 88: 81 (D&C 38:41) Behold, I sent you out to testify and warn the people, and it becometh every man who hath been warned to warn his neighbor.

So, few laborers for such a big job.
Luke 10: 2 (Jacob 5:70)Therefore said he unto them, The harvest truly is great, but the labourers are few: pray ye therefore the Lord of the harvest, that he would send forth labourers into his harvest.

No more sorrow upon the Earth.
Alma 29: 1-2 O that I were an angel, and could have the wish of mine heart, that I might go forth and speak with the trump of God, with a voice to shake the earth, and cry repentance unto every people! Yea, I would declare unto every soul, as with the voice of thunder, repentance and the plan of redemption, that they should repent and come unto our God, that there might not be more sorrow upon all the face of the earth.

Helps us Remember the Lord Jesus Christ.
Alma 29:10 And behold, when I see many of my brethren truly penitent, and coming to the Lord their God, then is my soul filled with joy; then do I remember what the Lord has done for me, yea, even that he hath heard my prayer; yea, then do I remember his merciful arm which he extended towards me.

Brings salvation to our soul.
D&C 4 and lo, he that thrusteth in his sickle with his might, the same layeth up in store that he perisheth not, but bringeth salvation to his soul;