And he called out to Moses; and G-d spoke to him from the Tent of Meeting, saying (Leviticus. 1:1)
As explained by Rashi, G-d prefaced each exchange with Moses by calling out to him, indicative of His great love.
This love between G-d and Moses is symbolic of the open and loving relationship enjoyed by the Jewish people when the Holy Temple still stood and the Divine Presence rested in the Holy of Holies. This love has not diminished any during the exile; it has only became less open and revealed.
The way to restore the relationship with G-d to its former glory is by expressing unconditional love for our fellow Jew. If the Jewish people will be united in brotherhood and unity, G-d's love for Moses will once again be fully expressed when the dead are resurrected and the Third Holy Temple is rebuilt. (Likutei Sichot, Volume 27)
If any one of you bring an offering (Leviticus 1:2)
The elevated spiritual standing of holy and righteous tzadikim is ensured by the actions of the entire Jewish people.
It is in their merit that the leader of the generation draws closer and closer to G-d. (The Holy Alshich)
If his offering be a burnt-sacrifice (Leviticus 1:3)
Because thought always precedes deed, the burnt-sacrifice, brought to atone for evil intentions, is listed first in the order of offerings. "That which was created last arose in the mind first." (Rabbenu Bechaye)
